Malicious PDF — malware analysis report

Static analysis result for SHA-256 da387d299ae4621d…

MALICIOUS

PDF

84.1 KB Created: 2021-04-23 06:59:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c66b15259d6893ce44f9b54b43e38a9f SHA-1: f2cf941b69e34b40b0964bfb547f6d83da49e066 SHA-256: da387d299ae4621dc6deaca0d8e757402ac585d361459cd211bb513c23e71697
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, with one prominent URL pointing to a suspicious domain ('pelibifir.ru') that likely serves as a landing page for malicious content. The heuristic 'PDF_SEO_LINK_FARM' suggests the document is designed to host a large number of links, potentially for SEO manipulation or to distribute various payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://pelibifir.ru/strik?utm_term=lights+out+2+dvd+release+date PDF link annotation
    • http://sodahq.club/665248420112qysi.pdfIn PDF document text
    • http://usacarins.com/shutterstock_video_free_without_watermarkgjlyi.pdfIn PDF document text
    • https://pabebubi.weebly.com/uploads/1/3/2/6/132695301/2285157.pdfIn PDF document text
    • https://nezivubu.weebly.com/uploads/1/3/1/3/131384481/jukituxivit.pdfIn PDF document text
    • https://jaxikagiwuzeno.weebly.com/uploads/1/3/4/6/134698588/880339.pdfIn PDF document text
    • http://kernig.pro/zizorewixupawekk3uv.pdfIn PDF document text
    • https://jirogadipew.weebly.com/uploads/1/3/1/6/131606393/04c09e21181.pdfIn PDF document text
    • http://welakeriduxu.22web.org/frases_hechas_en_ingls.pdfIn PDF document text
    • https://gikotaduxig.weebly.com/uploads/1/3/1/4/131454052/lukeradurof.pdfIn PDF document text
    • http://wide-mean.top/how_to_get_your_ex_back_no_contact_rulekmkc1.pdfIn PDF document text
    • https://fevowavekotaxuw.weebly.com/uploads/1/3/4/6/134635114/6359005fe2e.pdfIn PDF document text
    • http://neo-tp.ru/navy_pilot_training_planes8pctd.pdfIn PDF document text
    • https://fovepupaveveri.weebly.com/uploads/1/3/1/3/131384368/vepiwiraxikatib.pdfIn PDF document text
    • https://zojufagilazit.weebly.com/uploads/1/3/0/9/130969654/3e033528fb65.pdfIn PDF document text
    • https://wenebuzonuk.weebly.com/uploads/1/3/1/8/131857431/d6960b6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tikofaketonub/karelia_tobacco_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/fuwesikamuzon.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/indian_and_world_geography_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/xomojoturemuliwobewigoro.pdfIn PDF document text
    • http://wamulax.epizy.com/atomic_structure_and_chemical_bonding_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/faferojuzewipaxese.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/fosimavikubope.pdfIn PDF document text
    • https://s3.amazonaws.com/libowebujakux/xesorinudepa.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/casio_tough_solar_watch_price_in_philippines.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fece.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECE 4996 bytes
SHA-256: cb952a9465b7b4a91962ce480fb3d5f28a964a05f0e2a880041be131a4a48e55
font_01_sfnt_off00010fee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FEE 11372 bytes
SHA-256: 573e0a9a31a5922f5505f2e4acfa6040a8d1cda80df1c3520e99ea374e1d2b33
font_02_sfnt_off000134de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134DE 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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